Elongate mounting structure and mounting unit comprising the same for mounting an architectural covering between opposing mounting surfaces

An architectural covering comprising:

• a covering;
• an elongate mounting structure elongated in a longitudinal direction and being configured to support the covering, the elongate mounting structure comprising:
• an elongate main member including a lower receiving portion and an upper receiving portion positioned above the lower receiving portion, the lower receiving portion defining a lower storage space of the elongate main member, the upper receiving portion defining an upper storage space of the elongate mounting structure;
• and
• an overhang portion projecting from the elongate main member in a lateral direction that is perpendicular to the longitudinal direction;
• and
• a first assembly received in the lower storage space defined by the lower receiving portion;
• a second assembly received in the upper storage space defined by the upper receiving portion such that the second assembly is supported within the elongate mounting structure above the first assembly;
• wherein:
• the lower receiving portion includes a lower front wall and a lower rear wall at least partially defining the lower storage space:
• the upper receiving portion includes an upper front wall and an upper rear wall at least partially defining the upper storage space:
• each of the upper front and rear walls extends vertically between a bottom end of the respective wall and a top end of the respective wall, the top ends of the upper front and rear walls forming an upper end of the elongate main member;
• the overhang portion extends from the top end of the upper front wall of the upper receiving portion in the lateral direction:
• the covering is configured to be attached to the overhang portion such that the covering extends substantially vertically in front of at least part of the elongate main member;
• and
• one of the first assembly or the second assembly comprises a drive assembly configured to raise and lower the covering via a cord guided by at least a portion of the overhang portion.